albedo, height, roughness? Texture download included a bunch of files. How do I properly use them?
I struggle with this as well, but I found that activating Node Wrangler in the add-on gave me access to a great shortcut for creating principled shaders.  If you go to the node editor and change the diffuse node created when you make a new cycles material to principled then while it is selected  hit ctrl, shift, T it opens a screen to let you select your images.  Highlight all and then click the open button and it will build a proper principled shader tree putting them into the right spots.  I haven't tried it with an AO file though because I'm not sure what that's for and I was under the impression Blender didn't use them, but I could be wrong about that.  Hope this helps you out a little bit.